CN105299839A - Filtering net state detecting method and device - Google Patents

Filtering net state detecting method and device Download PDF

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Publication number
CN105299839A
CN105299839A CN201510761368.4A CN201510761368A CN105299839A CN 105299839 A CN105299839 A CN 105299839A CN 201510761368 A CN201510761368 A CN 201510761368A CN 105299839 A CN105299839 A CN 105299839A
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CN
China
Prior art keywords
warning message
predetermined threshold
unit
pwm dutycycle
screen pack
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Granted
Application number
CN201510761368.4A
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Chinese (zh)
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CN105299839B (en
Inventor
张晓慈
杨华生
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201510761368.4A priority Critical patent/CN105299839B/en
Publication of CN105299839A publication Critical patent/CN105299839A/en
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Publication of CN105299839B publication Critical patent/CN105299839B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28Arrangement or mounting of filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32Responding to malfunctions or emergencies
    • F24F11/39Monitoring filter performance

Abstract

The invention provides a filtering net state detecting method and device. The method comprises the steps that the current PWM duty ratio of a unit is detected; under the situation that it is determined that the PWM duty ratio is smaller than a first preset threshold value, the filtering net washing alarm information is generated; and under the situation that it is determined that the PWM duty ratio is smaller than a second preset threshold value, the filtering net replacement alarm information is generated, wherein the first preset threshold value is larger than the second preset threshold value. The technical problem that in the prior art, the washing and replacing time of a filtering net cannot be accurately determined is solved, and the technical effects that the washing and replacing time of a filtering net is accurately determined, and a user can be reminded in time are achieved.

Description

Screen pack condition detection method and device
Technical field
The present invention relates to field of intelligent control technology, in particular to a kind of screen pack condition detection method and device.
Background technology
Air-conditioning system generally all can install sieve pack, and screen pack belongs to consumptive material, needs periodic replacement.The service time of screen pack is relevant with the air quality of air-conditioning installation environment, and general air quality is poorer, and dust is more, and greasy dirt is more, screen pack need to change just frequently.
Current practices well is in the operation instructions of air-conditioning, indicate the general service time of screen pack, notifies when user needs to change screen pack with this.But, in the process that reality uses, can't active warning user need to change screen pack, and because the air quality of the actual installation environment of air-conditioning is different, also just cause the length in service life of screen pack widely different, if only adopt the mode thought and estimate, very inaccuracy.If filter screen replacement early, can waste screen pack, if filter screen replacement evening, filter effect can be caused to be deteriorated.
For cleaning and replacing construction how accurately to determine screen pack, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide a kind of screen pack condition detection method, accurately cannot determine the cleaning of screen pack and the technical problem of replacing construction to solve in prior art, the method comprises:
Detect the PWM dutycycle that unit is current;
When determining that described PWM dutycycle is less than the first predetermined threshold, generate cleaned filter screen warning message;
When determining that described PWM dutycycle is less than the second predetermined threshold, generate and change screen pack warning message, wherein, described first predetermined threshold is greater than described second predetermined threshold.
In one embodiment, corresponding the first different predetermined threshold of different wind shelves and the second different predetermined thresholds;
Correspondingly,
Before determining whether described PWM dutycycle is less than described first predetermined threshold, described method also comprises:
Determine the wind shelves at the current place of unit,
Obtain the first predetermined threshold corresponding to wind shelves and the second predetermined threshold determined.
In one embodiment, detect the PWM dutycycle that unit is current, comprising:
Determine the current state whether being in stable operation of unit;
When unit is in the state of stable operation, detect the PWM dutycycle of unit.
In one embodiment, detect the PWM dutycycle that unit is current, comprising:
Detect and whether generated cleaned filter screen warning message, and/or, change screen pack warning message;
If do not generate cleaned filter screen warning message and change screen pack warning message, then detect the current PWM dutycycle of unit.
In one embodiment, whether generated cleaned filter screen warning message in detection, and/or after changing screen pack warning message, described method also comprises:
If generated cleaned filter screen warning message, and/or, change screen pack warning message, then detect the current PWM dutycycle of unit, and determine whether the PWM dutycycle detected is greater than the 3rd predetermined threshold, wherein, described 3rd predetermined threshold is greater than described first predetermined threshold;
If be greater than, then remove the cleaned filter screen warning message generated, and/or, change screen pack warning message.
The embodiment of the present invention additionally provides a kind of screen pack condition checkout gear, and accurately cannot determine the cleaning of screen pack and the technical problem of replacing construction to solve in prior art, this device comprises:
Detection module, for detecting the current PWM dutycycle of unit;
First generation module, for when determining that described PWM dutycycle is less than the first predetermined threshold, generates cleaned filter screen warning message;
Second generation module, for when determining that described PWM dutycycle is less than the second predetermined threshold, generate and change screen pack warning message, wherein, described first predetermined threshold is greater than described second predetermined threshold.
In one embodiment, said apparatus also comprises:
Wind shelves determination module, for before determining whether described PWM dutycycle is less than described first predetermined threshold, determine the wind shelves at the current place of unit, and obtain the first predetermined threshold corresponding to wind shelves and the second predetermined threshold determined, wherein, corresponding the first different predetermined threshold of different wind shelves and the second different predetermined thresholds.
In one embodiment, described detection module comprises:
Running status determining unit, for determining the current state whether being in stable operation of unit;
One PWM dutycycle detecting unit, for when determining that unit is in the state of stable operation, detects the PWM dutycycle of unit.
In one embodiment, described detection module comprises:
Warning message detecting unit, for detecting whether generated cleaned filter screen warning message, and/or, change screen pack warning message;
2nd PWM dutycycle detecting unit, for when determining do not generate cleaned filter screen warning message and change screen pack warning message, detects the PWM dutycycle that unit is current.
In one embodiment, described detection module also comprises:
Clearing cell, for determining to generate cleaned filter screen warning message, and/or, when changing screen pack warning message, detect the PWM dutycycle that unit is current, and determine whether the PWM dutycycle detected is greater than the 3rd predetermined threshold, when determining that the PWM dutycycle detected is greater than described 3rd predetermined threshold, remove the cleaned filter screen warning message generated, and/or, change screen pack warning message, wherein, described 3rd predetermined threshold is greater than described first predetermined threshold.
In the above-described embodiments, preset PWM duty cycle threshold, compared with the PWM duty cycle threshold preset by the PWM dutycycle detected, if be less than the PWM duty cycle threshold preset, then can illustrate that screen pack needs cleaning or needs to have changed, this time just automatically generates cleaned filter screen warning message or changes screen pack warning message to notify user.Effectively can solve in prior art by the way and accurately cannot determine the cleaning of screen pack and the technical problem of replacing construction, reach the cleaning and replacing construction of accurately determining screen pack, and can the technique effect of reminding user in time.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the method flow diagram of the screen pack condition detection method according to the embodiment of the present invention;
Fig. 2 is debug process flow chart in the screen pack condition detection method according to the embodiment of the present invention;
Fig. 3 is testing process flow chart in the screen pack condition detection method according to the embodiment of the present invention;
Fig. 4 is that in the screen pack condition detection method according to the embodiment of the present invention, dutycycle warning message removes flow chart;
Fig. 5 is the structured flowchart of the screen pack condition checkout gear according to the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is described in further details.At this, exemplary embodiment of the present invention and illustrating for explaining the present invention, but not as a limitation of the invention.
Inventor consider can by present Intelligent Measurement all technology the operational factor of air-conditioning or air quality are detected, then determine whether need cleaning or change screen pack by detecting the result obtained, and reminding user carries out cleaning or the replacement operation of screen pack.
But inventor further contemplates, calculate if add air quality parameters, so algorithm will be too complicated, and to the detection of air quality by from the cost increasing the detection that air-conditioning makes to a great extent.Inventor expects in the air-conditioning system of application direct current generator, when the permanent rotating speed of motor exports, air quantity and static pressure are inversely proportional to, but, when filter screen dirtying blocks up serious, the static pressure of air-conditioning system increases, and air quantity will reduce, and then PWM (pulse width modulation) dutycycle of meeting drive motors reduces.Therefore, can by the PWM dutycycle determination screen pack of air conditioner motor the need of cleaning or replacing.Wherein, PWM dutycycle refers to the ratio of high level shared by the whole cycle in the pulse period, and such as, 1 second high level, 1 second low level, so corresponding PWM dutycycle is exactly 50%.
As shown in Figure 1, propose a kind of screen pack condition detection method in this example, comprise the following steps:
Step 101: detect the PWM dutycycle that unit is current;
Step 102: when determining that described PWM dutycycle is less than the first predetermined threshold, generates cleaned filter screen warning message;
Step 103: when determining that described PWM dutycycle is less than the second predetermined threshold, generate and change screen pack warning message, wherein, described first predetermined threshold is greater than described second predetermined threshold.
In the above-described embodiments, preset PWM duty cycle threshold, compared with the PWM duty cycle threshold preset by the PWM dutycycle detected, if be less than the PWM duty cycle threshold preset, then can illustrate that screen pack needs cleaning or needs to have changed, this time just automatically generates cleaned filter screen warning message or changes screen pack warning message to notify user.Effectively can solve in prior art by the way and accurately cannot determine the cleaning of screen pack and the technical problem of replacing construction, reach the cleaning and replacing construction of accurately determining screen pack, and can the technique effect of reminding user in time.
The wind shelves that the unit of air-conditioning produces are different, and when wind shelves are different, corresponding normal dutycycle when running also is different.Therefore, in order to make to match with each wind shelves, the first different predetermined thresholds and the second different predetermined thresholds can be set for different wind shelves.Correspondingly, before determining whether described PWM dutycycle is less than described first predetermined threshold, also need the wind shelves determining the current place of unit, obtain the first predetermined threshold corresponding to wind shelves and the second predetermined threshold determined simultaneously.
Concrete, the predetermined threshold of each wind shelves can be that the dutycycle recorded is determined according to after project installation result, such as, can after project installation terminates, manual operator enters the debug phase, controls unit and automatically runs to high wind shelves from low wind shelves.And the PWM dutycycle remembered during each wind shelves stable operation, and the predetermined threshold determining each wind shelves correspondence with this.
Because unit just can enter steady operational status from unlatching or after needing to run a period of time after switching to another wind shelves, therefore, when the PWM dutycycle that each detection unit is current, first can also determine the current state whether being in stable operation of unit, only when unit is in the state of stable operation, just detect the PWM dutycycle of unit.
Consider that detecting the PWM dutycycle of unit is a lasting process, generate or show cleaned filter screen warning message, and/or, after changing screen pack warning message, user will carry out cleaning or the replacing of screen pack, and after having changed, PWM dutycycle enters regime values.Therefore, when the PWM dutycycle that each detection unit is current, can first judge whether to generate cleaned filter screen warning message, and/or, change screen pack warning message, if determine currently also do not generate cleaned filter screen warning message and change screen pack warning message, then detect the current PWM dutycycle of unit, to determine whether to generate cleaned filter screen warning message, and/or, change screen pack warning message.
Further, if detect and generate cleaned filter screen warning message, and/or, change screen pack warning message, so just determine whether current PWM dutycycle is greater than the 3rd predetermined threshold, if be greater than, just remove the cleaned filter screen warning message generated, and/or, change screen pack warning message.That is, if determine that current PWM dutycycle is greater than the 3rd predetermined threshold, so just prove that screen pack has been cleaned or changed, wherein, the 3rd predetermined threshold is greater than described first predetermined threshold.
Additionally provide a specific embodiment in the embodiment of the present invention to be described above-mentioned screen pack condition detection method, but it should be noted that this specific embodiment is only to better the present invention is described, do not form inappropriate limitation of the present invention.
This screen pack condition detection method specifically can be divided into following several step:
Step 1: as shown in Figure 2, after project installation terminates, manual operator enters the debug phase, controls unit and automatically runs to high wind shelves from low wind shelves, and PWM dutycycle when remembering each wind shelves stable operation: PWM01, PWM02 ... PWM0i.
Step 2: as shown in Figure 3, after each start constant wind shelves, detect the PWM dutycycle PWMi of wind shelves correspondence now, if PWMi<PWM0i × P1, just generate cleaned filter screen warning message, if PWMi<PWM0i × P2, just generate and change screen pack warning message.
Step 3: as shown in Figure 4, as PWMi>PWM0i × P3, remove cleaned filter screen warning message or change screen pack warning message, wherein, 0<P2<P1<P3LEssT.L TssT.LT1.
In upper example, the dirty stifled state of the air-conditioning filter net using direct current generator is determined by PWM dutycycle, because determined by PWM dutycycle, therefore do not need the hardware circuit changing the original circuit of air-conditioning, only need change software control when to increase project installation and commissioning step with the PWM duty contrasted under same shelves wind speed.Can solve by the way and detect filter screen dirtying and block up the complicated and problem that parameter is too much of algorithm, and not increase hardware cost.
Based on same inventive concept, additionally provide a kind of screen pack condition checkout gear in the embodiment of the present invention, as described in the following examples.The principle of dealing with problems due to screen pack condition checkout gear is similar to screen pack condition detection method, and therefore the enforcement of screen pack condition checkout gear see the enforcement of screen pack condition detection method, can repeat part and repeat no more.Following used, term " unit " or " module " can realize the software of predetermined function and/or the combination of hardware.Although the device described by following examples preferably realizes with software, hardware, or the realization of the combination of software and hardware also may and conceived.Fig. 5 is a kind of structured flowchart of the screen pack condition checkout gear of the embodiment of the present invention, can comprise as shown in Figure 5: detection module 501, first generation module 502 and the second generation module 503, be described this structure below.
Detection module 501, for detecting the current PWM dutycycle of unit;
First generation module 502, for when determining that described PWM dutycycle is less than the first predetermined threshold, generates cleaned filter screen warning message;
Second generation module 503, for when determining that described PWM dutycycle is less than the second predetermined threshold, generate and change screen pack warning message, wherein, described first predetermined threshold is greater than described second predetermined threshold.
In one embodiment, said apparatus can also comprise: wind shelves determination module, for before determining whether described PWM dutycycle is less than described first predetermined threshold, determine the wind shelves at the current place of unit, and obtain the first predetermined threshold corresponding to wind shelves and the second predetermined threshold determined, wherein, corresponding the first different predetermined threshold of different wind shelves and the second different predetermined thresholds.
In one embodiment, detection module 501 can comprise: running status determining unit, for determining the current state whether being in stable operation of unit; One PWM dutycycle detecting unit, for when determining that unit is in the state of stable operation, detects the PWM dutycycle of unit.
In one embodiment, detection module 501 can comprise: warning message detecting unit, for detecting whether generated cleaned filter screen warning message, and/or, change screen pack warning message; 2nd PWM dutycycle detecting unit, for when determining do not generate cleaned filter screen warning message and change screen pack warning message, detects the PWM dutycycle that unit is current.
In one embodiment, detection module 501 can also comprise: clearing cell, for determining to generate cleaned filter screen warning message, and/or, when changing screen pack warning message, detect the PWM dutycycle that unit is current, and determine whether the PWM dutycycle detected is greater than the 3rd predetermined threshold, when determining that the PWM dutycycle detected is greater than described 3rd predetermined threshold, remove the cleaned filter screen warning message generated, and/or, change screen pack warning message, wherein, described 3rd predetermined threshold is greater than described first predetermined threshold.
In another embodiment, additionally provide a kind of software, this software is for performing the technical scheme described in above-described embodiment and preferred embodiment.
In another embodiment, additionally provide a kind of storage medium, store above-mentioned software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
From above description, can find out, the embodiment of the present invention achieves following technique effect: preset PWM duty cycle threshold, compared with the PWM duty cycle threshold preset by the PWM dutycycle detected, if be less than the PWM duty cycle threshold preset, then can illustrate that screen pack needs cleaning or needs to have changed, this time just automatically generates cleaned filter screen warning message or changes screen pack warning message to notify user.Effectively can solve in prior art by the way and accurately cannot determine the cleaning of screen pack and the technical problem of replacing construction, reach the cleaning and replacing construction of accurately determining screen pack, and can the technique effect of reminding user in time.
Obviously, those skilled in the art should be understood that, each module of the above-mentioned embodiment of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the embodiment of the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a screen pack condition detection method, is characterized in that, comprising:
Detect the pulse width modulation (PWM) dutycycle that unit is current;
When determining that described PWM dutycycle is less than the first predetermined threshold, generate cleaned filter screen warning message;
When determining that described PWM dutycycle is less than the second predetermined threshold, generate and change screen pack warning message, wherein, described first predetermined threshold is greater than described second predetermined threshold.
2. method according to claim 1, is characterized in that, corresponding the first different predetermined threshold of different wind shelves and the second different predetermined thresholds;
Correspondingly,
Before determining whether described PWM dutycycle is less than described first predetermined threshold, described method also comprises:
Determine the wind shelves at the current place of unit,
Obtain the first predetermined threshold corresponding to wind shelves and the second predetermined threshold determined.
3. method according to claim 1, is characterized in that, detects the PWM dutycycle that unit is current, comprising:
Determine the current state whether being in stable operation of unit;
When unit is in the state of stable operation, detect the PWM dutycycle of unit.
4. method according to claim 1, is characterized in that, detects the PWM dutycycle that unit is current, comprising:
Detect and whether generated cleaned filter screen warning message, and/or, change screen pack warning message;
If do not generate cleaned filter screen warning message and change screen pack warning message, then detect the current PWM dutycycle of unit.
5. method according to claim 4, is characterized in that, whether has generated cleaned filter screen warning message in detection, and/or after changing screen pack warning message, described method also comprises:
If generated cleaned filter screen warning message, and/or, change screen pack warning message, then detect the current PWM dutycycle of unit, and determine whether the PWM dutycycle detected is greater than the 3rd predetermined threshold, wherein, described 3rd predetermined threshold is greater than described first predetermined threshold;
If be greater than, then remove the cleaned filter screen warning message generated, and/or, change screen pack warning message.
6. a screen pack condition checkout gear, is characterized in that, comprising:
Detection module, for detecting the current PWM dutycycle of unit;
First generation module, for when determining that described PWM dutycycle is less than the first predetermined threshold, generates cleaned filter screen warning message;
Second generation module, for when determining that described PWM dutycycle is less than the second predetermined threshold, generate and change screen pack warning message, wherein, described first predetermined threshold is greater than described second predetermined threshold.
7. device according to claim 6, is characterized in that, also comprises:
Wind shelves determination module, for before determining whether described PWM dutycycle is less than described first predetermined threshold, determine the wind shelves at the current place of unit, and obtain the first predetermined threshold corresponding to wind shelves and the second predetermined threshold determined, wherein, corresponding the first different predetermined threshold of different wind shelves and the second different predetermined thresholds.
8. device according to claim 6, is characterized in that, described detection module comprises:
Running status determining unit, for determining the current state whether being in stable operation of unit;
One PWM dutycycle detecting unit, for when determining that unit is in the state of stable operation, detects the PWM dutycycle of unit.
9. device according to claim 6, is characterized in that, described detection module comprises:
Warning message detecting unit, for detecting whether generated cleaned filter screen warning message, and/or, change screen pack warning message;
2nd PWM dutycycle detecting unit, for when determining do not generate cleaned filter screen warning message and change screen pack warning message, detects the PWM dutycycle that unit is current.
10. device according to claim 9, is characterized in that, described detection module also comprises:
Clearing cell, for determining to generate cleaned filter screen warning message, and/or, when changing screen pack warning message, detect the PWM dutycycle that unit is current, and determine whether the PWM dutycycle detected is greater than the 3rd predetermined threshold, when determining that the PWM dutycycle detected is greater than described 3rd predetermined threshold, remove the cleaned filter screen warning message generated, and/or, change screen pack warning message, wherein, described 3rd predetermined threshold is greater than described first predetermined threshold.
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CN105841295A (en) * 2016-03-28 2016-08-10 海信(山东)空调有限公司 Filter screen service life detecting method and device
CN105843060A (en) * 2016-04-07 2016-08-10 美的集团股份有限公司 Household electrical appliance consumable purchase prompting method and equipment, intelligent terminal and automobile
CN106370571A (en) * 2016-08-31 2017-02-01 青岛海尔空调器有限总公司 Dust concentration detection method, dust sensor and filter net cleaning reminding method
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CN108079701A (en) * 2016-11-21 2018-05-29 苏州三星电子有限公司 A kind of detection method and system of filter screen dust accumulation degree
CN108079701B (en) * 2016-11-21 2020-11-06 苏州三星电子有限公司 Method and system for detecting dust deposition degree of filter screen
CN107192099A (en) * 2017-06-14 2017-09-22 广东美的暖通设备有限公司 Air-conditioning and its laying dust determination methods and laying dust judgment means and laying dust judge system
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CN111272628B (en) * 2020-02-17 2023-02-24 海信空调有限公司 Air purification equipment and filter screen service life detection method and detection device thereof
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